Aclees, Schoenherr, 1835

Meregalli, Massimo, Boriani, Marco, Taddei, Andrea, Hsu, Chen-Fu, Tseng, Wei-Zhe & Mouttet, Raphaëlle, 2020, A new species of Aclees from Taiwan with notes on other species of the genus (Coleoptera: Curculionidae: Molytinae), Zootaxa 4868 (1), pp. 1-26 : 12

Key to the species of Aclees from Taiwan

1. Dorsum of rostrum finely punctate. Pronotum regularly punctate, weakly wrinkled only at basal and lateral areas, punctures smaller and smoother, regularly impressed on dorsal area before middle ( Fig. 6F ). China, Japan, Philippines, Taiwan................................................................................... Aclees hirayamai Kȏno, 1933

- Dorsum of rostrum strongly punctate. Pronotum wrinkled-punctate on entire surface, lacking small, regularly impressed punctures on dorsal area before middle ( Figs 5 A–B, 6A–E)........................................................ 2

2. Lamella of penis short, ratio length/width 0.6, sides slightly sinuate, apex shortly rounded ( Figs 4B, 4D ); everted endophallus as in Figs 4H, 4J, 4L . Pronotum with sides linear, maximum width at base, punctures in dorsal basal part usually merged in short grooves, interspaces between grooves very irregular, convex ( Fig. 5B ); elytral striae 1 and 2 with about 20 punctures from base to apex, interspaces between punctures usually as long as punctures ( Fig. 5D ); scales on elytra long lanceolate, glossy yellow, irregularly spaced; median part of elytra, on intervals 4-6, often with a few scales grouped, not inserted in a regular row and with some minute extremely short hair like setae ( Fig. 5H ). Taiwan, introduced to Italy and France................................................................................................ Aclees taiwanensis Kȏno, 1933

- Lamella of penis slender, ratio length/width 0.7, triangular, slides straight, apex obtusely acute ( Figs 4A, 4C ); everted endophallus as in figs 3 and 4G, 4I, 4K. Pronotum with sides weakly curvilinear, maximum width slightly before base, punctures in basal part often individually impressed, seldom forming short oblique grooves, interspaces of punctures and grooves almost flat ( Figs 5A , 6 A–D); elytral striae 1 and 2 with about 25 punctures, interspaces between punctures usually shorter than punctures ( Fig. 5C ); scales on elytra short, very sparsely aligned in a single row on intervals ( Fig. 5G ). Taiwan, China, Vietnam....................................................................... Aclees aenigmaticus Meregalli & Boriani , n. sp.

Figures

FIGURE 4. Aclees aenigmaticus sp. n. Paratype, Taiwan. Penis, dorsal view (A), profile (E); apex of penis (C); everted endophallus, profile (G), dorsal view (I), frontal view (K). Aclees taiwanensis Kôno, 1933, Taiwan. Penis, dorsal view (B), profile (F); apex of penis (D); everted endophallus, profile (H), dorsal view (J), frontal view (L).

FIGURE 5. Aclees aenigmaticus sp. n. Paratype, Taiwan. Pronotum (A), elytra (C), detail of elytral scales and setae (G), antenna (E), ventrites (I); Aclees taiwanensis Kôno, 1933, Taiwan. Pronotum (B), elytra (D), detail of elytral scales and setae (H), antenna (F), ventrites (L).

FIGURE 6. Aclees aenigmaticus sp. n., Pronotum. China, Guangxi (A); China, Sichuan, paratype (B); China, Yunnan (C); Vietnam, paratype (D). Locality data as in the list of the material examined. Aclees foveatus Voss, 1932, Lectotype (E). Aclees hirayamai Kôno, 1933, Taiwan, New Taipei City, Shuiyuan, Wei-Zhe Tseng legit (F).